fix: use clipboard paste for non-ASCII input (e.g. Chinese)

[junshi5218]

AXorcist synthetic typeText uses key codes and produces wrong output for Chinese/Unicode. For text with non-ASCII, use Cmd+V paste instead.

[mcheemaa]

Hey @junshi5218, thank you for this contribution! This is a real problem that affects CJK users and we appreciate you taking the time to fix it.

We verified your fix against the AXorcist source. The underlying typeCharacter in AXorcist does actually use keyboardSetUnicodeString() to set Unicode characters on the CGEvent (not raw key codes), but the issue is that when a CJK Input Method Editor is active, macOS intercepts the event at the IME layer and reads the virtualKey (which is hardcoded to 0, i.e. 'a') instead of the Unicode string. That is why you get "aaaaa" for Chinese text. Your clipboard paste approach is the right fix for this.

Here is the relevant AXorcist source for reference:
https://github.com/steipete/AXorcist/blob/c75d06f7f93e264a9786edc2b78c04973061cb2f/Sources/AXorcist/Core/Element+UIAutomation.swift#L185-L211

One thing we spotted: there is a small bug in typeViaPaste with the clipboard save/restore ordering. Right now the code does:

pasteboard.clearContents()
let oldString = pasteboard.string(forType: .string)

This clears the pasteboard first and then tries to read the old content, so oldString will always be nil. Just swap those two lines:

let oldString = pasteboard.string(forType: .string)
pasteboard.clearContents()

One other small suggestion: since Cmd+V posts an async CGEvent, the target app might not have finished reading the clipboard by the time the defer block runs and restores it. Adding a small sleep before the restore would make this more robust:

defer {
    Thread.sleep(forTimeInterval: 0.05)
    pasteboard.clearContents()
    if let oldString { pasteboard.setString(oldString, forType: .string) }
}

Fix the clipboard ordering and this is good to merge. Thanks again for contributing to Ghost OS!

[junshi5218]

Fixed. Thanks for pointing out the issue.

[mcheemaa]

Both fixes look good. Thank you for the contribution!